pearson



(No Model.) 2 Sheets-Sheet 1..

O. PEARSON, Decd.

M. PEARSON, Administratrix. PILE CUTTING MBGHANISM FOR DOUBLE PILEFABRIO LOOMS.

No. 394,606. Patented Dec. 18, 1888.

INVENTOR N, PETERS. Plwwumn n her, Washimzlcm. D. C.

WITNESSES:

2 SheetsSheet 2.

G. PEARSON, Decd. M. Pmnsou, Administratrix.

Patented Dec. 18, 1888.

(No Model.)

PILE CUTTING MECHANISM FOR DOUBLE PILE FABRIC LOOMS.

INVENTOR .W.ITN ESSESI: 6W0- N4 PETiRs. Phdoiilhognplwn Washington. D.c.

- UNITED STATES PATENT OFFICE.

t n n fin CHARLES PEARSON, OF PHILADELPHIA, PENNSYLVANIA; SAID PEARSONAND HIS ADMINISTRATRIX (MARY PEARSON) ASSIGNORS T JOHN DOBSON AND JAMESDOBSON, BOTH OF SAME PLACE.

FILE-CUTTING M ECHAN ISM FOR DOUBLE-PILE-FABRIC LOOMS.

SPECIFICATION forming part of Letters Patent No. 394,606, dated.December 18, 1888. Application filed December 5, 1884- Serial No.149,546. (No model.) Patented in England April 17, 1885, No. 4,766.

T0 all whom, it may concern: rack-bar and gearing to actuate the pulley-50 Be it known that I, CHARLES PEARSON, a Wheel, and the cords or bandsleading from subject of the Queen of Great Britain, at the latter to theknife-carriage. Figs. 6 and present residing in the city ofPhiladelphia, 7 are side and top views, respectively, of the in theState of Pennsylvania, have invented cam and rack-bar by means of whichthe pulcertain new and useful Improvements in Pileley-wheel is partiallyrevolved in opposite di- 5 5 Cutting Mechanism for Double-Pile-Fabricrections to wind and unwind thereon cords Looms, of which the followingis a full, clear, attached to opposite sides of the knife-carand exactdescription, reference being had to riage, by means whereof the latteris recipro- 10 the accompanying drawings, forming a part cated in thecarriage-race.

of this specification, and for which I have 0b- The construction andoperation of that part tained a patent in England, dated April 17, ofthe mechanism of the loom which is used 1885, No. 4,766. for weaving thedouble pile fabric in the My invention relates to that part of themannerstatedIdonotdeemit necessary to de- 15 mechanism of the loom usedfor severing the scribe, the same being well known in the art;

pile-threads of double pile fabrics woven in and I shall thereforeconfine myself to showthe well-known manner in two backings or ing anddescribing only that part of the mechcloths with intervening connectingpileanisin of thelooln involving myinvention, and threads, so that whenout apart laterally which performs the otlice of cutting the fabric 20through the pile two distinct pieces of pile laterally and l'n'oducingtherefrom two pieces fabric are produced; and my invention conof pilefabric. sists in the construction and arrangement of The framingsupports between its sides A the driving mechanism which reciprocates A,at the front of the loom, a supporting or the knife-carriage, and in theconstruction and cutting bar, L, which is a fiat metal plate rea 5arrangement on the transverse guide-plate or cessed at R, to admit ofthe insertion and vercarriage-race of stopping mechanism for the ticalmotion therein of the housing or frame knife-carriage, as hereinafterfully described. for the sharpening-rollers, which need not be In thedrawings, Figure 1 is a front view of described, as they may be of anyknown cona part of a loom for weaving double pile fabstrnction. l'ponthis plate or bar L the woven 3 ric, showing the arrangement of thegrooved double pile fabric is received and over it the race-bar, thecords which reciprocate the cutting-knife K" passes. The bar L may,knife carriage, the circumferentially-grooved however, be recessed inlike manner at the double-acting pulley-wheel, and cog-gearing otherend, so as to admit of the insertion connecting the latter with therack-bar of the therein of a second and similar pair of sharp- 35actuating-cam. Fig. 2 is a top view of the ening-rollers, in order thatthe knife may be grooved guide-plate or carriage-race and supsharpenedat each extremity of its lateral porting-plate on which the pile fabricis sevtravel and during its intervals of rest at each ered. Fig. 3 is anenlarged top view of one end of the race-bar, as hereinafterdescribed.end of the carriage-race, showing the position Upper and lowervelvet-rollers, I F, suitap 4 of the knife-carriage, the mode ofsecuring bly mounted in the frame of the loom (see the cords thereto,the stopping device, and one Fig. -'l) take up the two pieces of severedpile of the cord friction-rollers. Fig. l is a defabric T T, cut apartby the knife K, from tached vertical section of the velvet-deliverthetwo woven connected backings and draw ing rollers, supporting-plate forthe fabric, forward the uncut double pile fabric T up to 45carriage-race,knife-carriage, and knife. Fig. the traveling knife as itis delivered over and 5 is a side view in vertical section of one sideupon the supporting-bar L. 5 of the loom from the inside, showing theup- The rollers F F are geared together and i per cam to actuate thesharpening mechanactuated by a Worm, to which motion is com- 1 ism, thelower or knife-actuating cam and its municated from the picking-shaft orby other appropriate means. Transversely across the front of the loom isarranged a grooved guideplate or carriage-race, M, the'position of whichelatively to the supporting-bar L is shown in Figs. 2, 4, and 5.This'transverse guide-plate is grooved longitudinally to form a slide orrace for the knife-carriage K ,and is recessed at both ends to admit twofriction pulleyrollers, N N, which have their bearings in theguide-plate.

The cutting mechanism proper consists of a knife-carriage, K, whichsupports a knifeholder, K, in which the knifel is adjusted, theconstruction and arrangement of all of which, however, are the same asheretofore employed and known in the art. .(For example, see Englishpatent of George Davies, No. 2,429, dated November 1, 1858.)

The knife-carriage moves laterally backward and forward in the groove ofthe guideplate or race-bar M, being so reciprocated therein by means'of.two cords, E E, each of which passes over its respective frictionrollerN or N in the guide-race M. One cord, E, is fastened to one side of theknife-carriage and passes thence over the frictionroller N, and theother cord, E, is fastened to the other side of the knife-carriage andpasses from thence over the other friction-roller, N. It is at thispoint in the construction of the driving mechanism that my improvementbegins. I-leretofore all such looms were supplied with a pair ofsingle-acting pulleywheels, one on each side of the framing of the loom,one wheel winding up one of said cords, E, while the other pulley wascaused to revolve at the same time to unwind the other cord, E, attachedto the other side of the knife-carriage, and vice versa, alternately,and these pulley-wh eels were usually mounted on a shaft extending fromside to side to the loom-frame, which shaft was revolved by a rack-barreciprocated by means of a cam, usually of complicated construction,connected directly or indirectly with the main driving-shaft. Suchconstruction caused inequalities in the working parts, due to unequalwear and tension of the cords and pulleys and their driving-gear, and itis well'known and manifest that the result would be and is acorresponding inequality and imperfection in the independentdriving-pulleys, each operating only upon its side of the knife-carriageto move it in one direction, and this result is aided in my improvedloom by the use of a single positive-action cam, instead of the usualdouble cam, to actuate the driving-pulley; hence I dispense with theusual pair of pul-. leysone on each side of the loon1mounted on a shaftextending from side to side of the loom-frame, and substitute therefor asingle double-acting )ulley-wheel, D, grooved circumferentially andrigidly secured to a shaft, 12, which has its outer bearing in an arm,H, affixed to the frame of the loom. Y

The cords E E, above described, fastened to either side of theknife-carriage and passing over the friction-rollers N N, have theirother endsfastened to the pulley D in the following manner: ()ne cord,say E, on the side of the loom supporting the pulley D passes directlyto the said pulley-wheel and has its end knotted in the peripherythereof, while the other cord, E, fastened to the other side of theknife-carriage, passes over its appropriate friction roller N, thenceunder the race-bar M to a second friction-roller, G, and thence to andpartially around the pulleywheel D in a contrary direction from theother cord,E, and is in like manner fastened thereto. The saidpulley-wheel has a movement given to it, which is a partial revolution,first in one direction and then in the other, by means of the mechanismhereinafter described, andshown in Figs. 5, 6, and 7. This arrangementcauses the knife-carriage K to be reciprocated in the grooved transverseguide-plate orrace-bar M, the to-and-fro movement in both directionsbeing accomplished by a single actuating mechanism, the doubleactingpulley-wheel D, with the described arrangement of the cords thereon,acting directly upon both sides of the knife-carriage at the same time,the winding up of cord E drawing the knife-carriage K in one direction,while the simultaneous unwinding of cord E permits of such movement, andvice versa, al-.

Figs. 5, 6, and '7, and it is actuated by a cogwheel, B Which gears witha cog-wheel, C, which, by means of its cam C, actuates the sharpeningmechanism, as shown in Fig. 5. The c0g-wheel C is mounted on the end ofa horizontal shaft having bearings in the frame of the loom. The cam Bis securely Ioo fixed to the outer face of its actuating cogwheel B,around the end of the shaft B,

upon which said cog is mounted, said shaft.

having its bearings inthe frame of the loom and projecting slightlybeyond the outer face of the cog. This cam B operates to givereciprocating motion to the rack-bar B by bearing alternately againstthe friction-rollers B and 13". The bar B is provided with a cograck,13", on a part of its upper surface, which gears with a small cog-wheel,D, secured to the same shaft as the cog D, which in turn drives the cogD', secured to the pulleywheel D, and by these means the saidpulleywheel is partially revolved in either direction alternately, andthus winds and unwinds successively the cords E E, one being wound upwhile the other is unwound, and vice versa, alternately, and soreciprocates the knife-carriage in the grooved guide-plate and seversthe double pile fabric presented to the knife over and upon thesupporting-bar L, as shown in Fig. 4, T representing; the uncut doublepile fabric, T T being the two pieces cut therefrom. cam B is of itselfanovel'feature of my invention. It is of the form of a segment of anannular plate with a central hole, thus showing two rounded sides, thesmaller (being the inner one) fitting rigidly around the cog-shaft B andthe larger (the outer side) being the part which comes in contact withthe frictionrollers 13 B Now the operation. of this cam B, beingarranged as shown, is such that, motion being given thereto byrevolution of the shaft B, moved by the cog-wheel B", the rack-bar B isreciproeated, and its rack B", acting on the cogs D D D, as described,causes a partial revolution of the pulley-wheel D in either direction,as the bar B may be movingbaclnvard or forward, depending upon theposition of the cam B between the friction-rollers 15 b and by this cambeing constructed and arranged as shown the rackbar B" is at-restpending that part of the revolution of the cam B shown in the drawings,Figs. 5 and G, as just completed, and therefore the knife-carriage isreeiprocated along the groove of the guide-plate M, not by a constantbackwardand-forward motion, but between intervals of positive rest(which occur directly opposite the sharpening-rollers) at each end ofits lateraltravel on the grooved race-plate, equal to two picks of theloom at each interval.

The second part of my improy'ement consists of an elastic stoppingmechanism for the knife-carriage at each end of its lateral travel inthe grooved race-bar M, as shown in Fig. 3, and described as follows:Two flanged cross-bars, 1 and 2, are secured to the plate M as bearingsfor a stoppenrod, 6, which has an enlarged end, 7, serving as a stopperfor the knife-carriage. Encireling this stopperrod, on that part of itwhich is between the flanges of the cross -bars, are placed two piecesof rubber tubing, 4 and 5, and between them a metal band, 3, having asetscrew, 8, by which latter either piece of rubber tubing maybecompressed to or from either flange of the cross-bars 1 and 2. By thisdevice,

The peculiar configuration of thiswhich serves as an elastic cushion forthe knife-carriage, I am also enabled to bring different parts of theknife-blade against the sharpening-rollers from time to time, as may be(lesired, by moving forward the rod (3 and shifting the position of theset-screw band :3 along the rod (3 to corresptmd, thereby bringing theenlarged end of the rod 0 in greater or less proximity to the extremepoint of lateral travel of the knifcmarriage, so that thesharpening-rollers may thus be brought to act on different portions ofthe knife-edge, according as the stopper-rod 6 may be adjusted laterallyin the manner described, the sharpening-rollers being usually madecircularly concave, or, if not so constructed in the first instance,assume that form from constant wear.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination, with the frame A of the loom, a transverse race-bar,M, and a knife-carriage, K, of mechanism to reciprocate saidknife-carriage in said race-bar, consisting of the double-actincircumferentiallygrooved pulley-wheel D, located and supported on oneside of the loom-frame, actuating-cords E E, connecting saidknife-carriage on opposite sides thereof with opposite points on theperiphery of said pulley-wheel, and mechanism to partially revolve saidpulley-wheel in either direction alternately, substantially asdescribed.

2. The combination, with the frame A, a transverse race-bar, aknife-carriage, and pulley mechanism to reciprocate the same in saidrace-bar, of actuating mechanism consisting of the shaft B and the camI5, constructed as a segment of an annular plate, with the smaller sidethereof applied to said shaft, the rack-bar B, and gearing connectingthe latter with said pulley mechanism, whereby the knife-carriage isreciprocated in said race-bar l'leiween intervals of positive rest ateach end thereof and opposite the sharpening mechanism, substantially asdescribed.

3. The combination, with the frame A and shaft B, of the single cam B,constructed as a segment of an annular plate, ,with the smaller sideapplied to the said shaft, the rack-bar IS, the double-acting pulley 1),arranged to reci n'ocate the knife-carriage in both directions, gearingconnecting said pulley-wheel with said rack-bar, the grooved race-bar M,knife-carriage K, and actuatingcords E E, connected with opposite endsof said knife-carriage and with opposite points on the periphery of saidpulley-wheel, said parts being constructed, combined, and operatingsubstantially in the manner and forthe purpose set forth.

4. The combination, with the frame A of the loom, a transverse race-bar,M, a laterally-reciprocating knife-carriage, and mechanism to so actuatethe same on said bar, of

elastic stopping mechanism for the knife-car-- riage, consisting of therod 6, its bearings 1 and 2, elastic tubing 4 5 and setscrew band 3,con- 5 strueted and arranged substantially as set forth. x

In testimony whereof I have hereunto affixed my signature this 21st dayof Novemher, A. D. 1884.

CHARLES PEARSON.

Witnesses:

FRANCIS S. BROWN, H. T. FENTON.

